Since all of the offspring have the purple phenotype, this tells us that the purple allele is dominant to the white allele. ... This means that 75% of the offspring displayed the dominant phenotype of purple flowers, and 25% displayed the recessive phenotype of white flowers.
Which flower color is dominant purple or white?
| Trait Dominant Expression Recessive Expression | Color of flower (P) Purple White | Form of ripe pods (I) Inflated Constricted | Color of unripe pods (G) Green Yellow | Position of flowers (A) Axial Terminal |
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Why is purple flower dominant?
Each plant has two copies of each gene: one copy from each parent plant. The F 1 generation inherits a purple allele and a white allele. Even though the plant has one copy of each, we only see the trait from the purple flower gene. When a plant has one copy of each gene, the gene we see is the dominant allele.
Are purple flowers dominant?
If a purple and a white flower are crossed and most of the resulting flowers are purple, then the allele that leads to a purple flower must be dominant , meaning that only the offspring that end up carrying both of the alleles for white will actually end up being white.
Could two plants with purple flowers produce a plant with white flowers?
Can two plants with purple flowers produce offspring with white flowers? Yes , if both parents are heterozygous for the trait.
What is Codominance inheritance?
Codominance means that neither allele can mask the expression of the other allele . An example in humans would be the ABO blood group, where alleles A and alleles B are both expressed. So if an individual inherits allele A from their mother and allele B from their father, they have blood type AB.
Are yellow seeds dominant or recessive?
The yellow-seed allele is dominant and the green-seed allele is recessive. When true-breeding plants were cross-fertilized, in which one parent had yellow seeds and one had green seeds, all of the F 1 hybrid offspring had yellow seeds.
Are white flowers dominant or recessive?
If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous. People with CF are homozygous recessive. Since Huntington's disease is autosomal dominant, people with the disease can be either homozygous dominant or heterozygous.
What happened when Mendel crossed pure breeding purple flowers with white flowers?
Mendel concluded that pea traits like flower color were determined by separate units. From the results, Mendel proved that all traits do not blend. For instance, purple flowers mixed with white flowers did not produce pink flowers . Mendel concluded that traits like flower color must be determined by individual units.
What are the two possible phenotypes for flower color?
An organism's genotype is its specific combination of alleles for a given gene. So, for example, in the pea plants above, the possible genotypes for the flower-color gene were red-red, red-white, and white-white . The phenotype is the physical manifestation of an organism's allellic combination (genotype).
What percentage of their offspring will have purple flowers?
Do you know where each letter (allele) in all four cells comes from? Two pea plants, both heterozygous for flower color, are crossed. The offspring will show the dominant purple coloration in a 3:1 ratio. Or, about 75% of the offspring will be purple.
What is the probability of the plants with purple flowers?
Checking the probability of fusion between the gametes produced by two plants crossed using Punnet Square method, it is seen that 75% plants will have at least one dominant allele (P) and thus will bear purple flowers. Only 25% plants will have recessive allele in homozygous state (pp).
What is the ratio of purple flowers to white flowers offspring?
Mendel's Results
Mendel noted the ratio of white flowered plants to purple-flowered plants was about 3:1 . That is, for every three purple-flowered plants, there was one white flowered plant.
When crossing purple flower plants Why would some of the offspring have white flowers?
Explanation: Let us consider a cross between two plants heterozygous for purple flowers. Each plant will produce two types of gametes, i.e. 50% gametes carrying (P) allele and 50 % carrying (p) allele. These plants will bear white flowers .
What is the probability of two heterozygous purple flowers making offspring that have white flowers?
The probability that one of their offspring will have white flowers is 1/4 .
Why did the F1 generation showed all flowers to be purple rather than a mix of white and purple flowers?
Mendel discovered that by crossing true-breeding white flower and true-breeding purple flower plants, the result was a hybrid offspring . Rather than being a mix of the two colors, the offspring was purple flowered. ... The resulting hybrids in the F1 generation all had violet flowers.
